Engo 3 review: Colour HUD, Garmin workout sync and 20‑hour battery make smart glasses a serious training tool

Table of Contents

1. Key Highlights
2. Introduction
3. Colour HUD: why red‑to‑green matters on the move
4. Garmin structured workout mode: an eye‑level coach
5. Battery and endurance use: 20 hours changes the use‑case
6. Hardware and controls: design choices that shape the experience
7. Engo 2 vs Engo 3: where upgrade value sits
8. Who should upgrade — and who should wait
9. Practical setup and in‑use tips
10. Training use cases and scenarios
11. Limitations and unanswered questions
12. Price, availability and buying advice
13. How Engo 3 fits into a broader training tech stack
14. The competition landscape and alternatives
15. Final evaluation: who benefits and why now
16. FAQ

Key Highlights

• Engo 3 upgrades the HUD to a multi‑colour, red‑to‑green display, adding instant zone recognition for pace, power and heart rate.
• Structured workout mode now syncs directly with Garmin sessions, showing live gauges, interval countdowns and zone targets in the lens.
• Battery life increases from 12 to 20 hours, while weight rises modestly to 38.5g; price starts at £299.95 (tinted) and ships from 31 March.

Introduction

Heads‑up displays for athletes have moved beyond novelty. The latest generation of Engo’s wearable HUD aims to replace wrist checks and handlebar devices by putting critical training data into the corner of an athlete’s vision. The Engo 3 keeps the basic formula—lightweight frames with a small, near‑eye display—while introducing three changes that matter for serious users: colour cues that map directly to training zones, a structured workout mode that mirrors Garmin sessions in real time, and a battery that lasts long enough for multi‑hour efforts. Those upgrades shift the product from interesting accessory to practical training partner for runners and cyclists who train by zones and intervals.

This review unpacks the hardware and software changes, compares Engo 3 to its predecessor, explores real‑world use cases, explains who benefits most, and lays out the trade‑offs athletes should weigh before upgrading.

Colour HUD: why red‑to‑green matters on the move

The most visible change on Engo 3 is the move from monochrome to multi‑colour. That change isn't cosmetic. When you’re running hard or negotiating traffic on a bike, the cognitive cost of interpreting numbers can slow reactions and force secondary glances at a wrist device. Colour mapping—red for above target, green for on target, amber for drifting off—replaces the need to read digits with a single, instinctive visual cue.

Practical benefits

• Immediate zone recognition: During interval sessions or tempo efforts the colour instantly confirms whether you’re holding the prescribed intensity. Glance, and you know if you must push or ease back.
• Reduced distraction: Colour reduces the time your eyes spend on the display. That preserves peripheral awareness and keeps attention on the road or trail.
• Faster feedback loop: When training by power or heart rate, early corrections prevent wasted efforts. Real‑time, colour‑coded feedback shortens the reaction time between data and behavior.

Examples from the field

• Track intervals: A runner working through a ladder set can rely on the HUD’s colour to stay within a target pace zone. Rather than read a pace value and calculate whether it’s acceptable, the runner gets a green confirmation that the effort is correct.
• Group rides: A cyclist trying to follow a paceline while holding a threshold power can check the lens with a quick head tilt. The colour cue confirms whether they’re contributing appropriately without compromising bike handling.
• Ultramarathons: After many hours on course, reading fine print becomes difficult. Colour zones give a simple, resilient signal that continues to work even when fatigue reduces cognitive bandwidth.

What colour doesn’t solve Colour helps immediate decision‑making but does not replace a need for context. Athletes will still want access to actual numbers for post‑session analysis and detailed pacing strategies. Colour also requires sensible defaults and customization—one athlete’s green may be another’s red, depending on target zones—so the experience depends on the ease of configuration and integration with training platforms.

Garmin structured workout mode: an eye‑level coach

Engo 3’s structured workout mode represents a functional leap. Instead of showing only raw metrics, the glasses can now mirror a Garmin workout: live gauges, interval countdowns and zone targets appear in the lens synchronized with your watch. For many athletes who build sessions on Garmin Connect or coach‑prescribed plans, that integration converts the glasses from passive display to active workout partner.

How the structured mode changes sessions

• Interval clarity: The HUD displays the current interval, time remaining and whether the effort is in the prescribed zone. That removes ambiguity when work and recovery alternates are short.
• Pace and power focus: Structured sessions that require precise pace or power targets become more manageable because the athlete receives continuous, hands‑free guidance.
• Reduced reliance on auditory cues: Many athletes use watch vibrations or audio prompts for intervals. HUD cues lower reliance on sound, which can get lost in wind or traffic noise.

Who benefits most Garmin users receive the clearest value. Athletes who use edge devices for cycling or a Forerunner for running and who follow detailed session plans will find the glasses streamline execution. Coaches who assign zone‑based sessions can expect better compliance from athletes who can see target confirmation at a glance.

Limitations and considerations

• Garmin‑only structured support at launch: Engo 3 confirms structured workout support for Garmin devices. Apple Watch and other platforms are supported for metric display, but structured workout support is specified for Garmin only. Athletes who rely on Apple Watch structured sessions or third‑party apps should verify feature parity.
• Sync reliability: The usefulness of on‑device workout guidance depends on robust synchronization between the watch and the glasses. Bluetooth 5.4 should improve pairing stability and latency versus older protocols, but real‑world conditions (crowded Bluetooth environment, firmware versions) can affect performance. Users should test their exact device combinations before relying on the HUD for race‑critical guidance.

Battery and endurance use: 20 hours changes the use‑case

The Engo 2 offered roughly 12 hours of continuous use. Engo 3 extends that to 20 hours. That improvement changes where and how athletes can rely on HUD eyewear.

Why battery life matters beyond raw hours

• Multi‑day and ultra events: A 20‑hour runtime covers most ultramarathons and long brevet rides on a single charge when used sparingly. Athletes who used to ration display time now have more freedom to keep it active.
• Less charging friction: Longer battery life reduces the frequency of charging and the risk of arriving at a key workout or race with a depleted device. For athletes who travel to events, that’s a tangible convenience.
• Consistency across modes: Longer life supports the power draw of colour driving multiple display elements. A multi‑colour display and structured session mode demand more energy, so achieving this improvement without making the device bulkier is notable.

Practical expectations and caveats

• Continuous use vs intermittent use: The advertised 20 hours is continuous use. Real‑world battery life will depend on brightness settings, frequency of screen updates, use of structured sessions and ambient temperature. Cold conditions accelerate battery drain.
• Charge cycles and longevity: Lithium batteries degrade. The day‑to‑day capacity will decline over many cycles. Engo’s increase in capacity matters now, but long‑term users should expect gradual reductions in endurance over years.
• Weight trade‑off: The battery increase contributed to a small weight rise—from 36g to 38.5g. That change is modest and unlikely to affect comfort for most, but athletes sensitive to grams—particularly in lightweight racing setups—should note the difference.

Use‑case scenarios enabled by battery life

• 100‑mile ultra: An ultrarunner pacing a 100‑mile race can maintain intermittent HUD use throughout the event without worrying about mid‑race charging. Colour cues during the night hours help maintain target effort zones.
• All‑day audax rides: Overnight or long daytime permanents often include long stints between controls. Consistent HUD access helps maintain average speed and zone adherence.
• Back‑to‑back training days: Coaches who schedule consecutive long sessions will find less need to recharge between efforts.

Hardware and controls: design choices that shape the experience

Engo 3 keeps the lightweight frame and near‑eye projector approach but adjusts a few user‑facing elements. Each decision affects usability and comfort.

Weight and fit

• 38.5g total weight places the Engo 3 in the same comfort class as other sport sunglasses. The extra 2.5g over engo2 is unlikely to be noticeable on a single run or ride. Fit and balance remain key determinants of comfort; lens and temple adjustments will be important for continued stability during high‑cadence cycling or steep descents.

Display control and interaction

• Double‑tap temple control replaces the older gesture sensor. Double‑tap is more deterministic—less likely to trigger accidentally and simpler to learn under motion. For cyclists wearing gloves or runners with wet hands, tactile control reduces frustration.
• Screen layout: Engo 3 supports up to six data fields per screen from a pool of 40+ metrics. That allows athletes to tailor the HUD to their priorities: pace/power/HR combinations for interval sessions, cadence/speed for technique work, or navigation cues for rides.

Water resistance and durability

• IP55 rating offers protection against dust and water jets. That rating confirms suitability for sweat, rain and typical outdoor exposure. It does not provide full submersion protection, so waterproofing expectations should be aligned with intended sports (no swimming with the unit).

Connectivity and compatibility

• Bluetooth 5.4 brings potential improvements in pairing stability, range and power efficiency. Engo lists compatibility with 81+ Garmin devices, Apple Watch and Suunto. Still, feature parity across platforms may vary—structured workout mode is specified for Garmin devices.

Lens options and visual clarity

• Lens choices include tinted and photochromic variants. Photochromic lenses adapt to changing light and suit athletes who transition between tunnels, dense tree cover and open roads. High‑contrast options on prior models indicate Engo understands the importance of visual clarity in different light conditions.

Engo 2 vs Engo 3: where upgrade value sits

Comparing a product to its predecessor helps buyers decide whether to upgrade. Engo 3 introduces three headline changes while adjusting price and minor specs.

Upgrades that justify an immediate purchase

• Colour HUD: If you regularly train by zones, the colour mapping alone can be a compelling reason to move to Engo 3. The faster cognitive response and reduced distraction improve session quality.
• Garmin structured workouts: Athletes who execute complex interval sets from a Garmin device will find the on‑lens guidance hard to replace. Structured workouts create a coach‑like experience at eye level.
• Battery life: For anyone doing long training days or ultras, 20 hours of battery changes usage patterns and reduces risk of mid‑session interruptions.

Changes to be aware of

• Price increase: Base price rises to £299.95 (tinted) and £349.95 (photochromic). Buyers should weigh the value of the new features against the extra cost.
• Slight weight increase: From 36g to 38.5g. Unlikely to matter for most but worth noting for ultra‑light purists.
• Gesture control replaced by double‑tap: Many users will prefer the determinism of a tap. Those who liked the gesture flexibility of engo2 may miss the previous sensor.

Examples where engo2 may still be enough

• Casual users who primarily want basic metrics and occasional live pace checks might not need colour or structured mode. If battery life and monochrome display were acceptable, the older model remains a cost‑effective option—assuming availability of engo2 units.
• Athletes whose workflows depend on Apple Watch structured sessions or Strava Live Segments should confirm that equivalent features exist on engo3 before upgrading. Engo 2 had specific Apple Watch features that are not explicitly referenced for the new model.

Who should upgrade — and who should wait

Engo 3 has a clear audience: athletes who train by zones, use Garmin structured sessions, and rely on hands‑free, glanceable feedback during workouts. That group gains the most practical value.

Ideal users

• Structured workout adherents: Triathletes, runners and cyclists who follow coach plans or build complex interval sessions in Garmin Connect. The lens becomes a live coach.
• Long‑distance athletes: Ultra‑runners and endurance cyclists who benefit from a HUD they can run off through long hours without charging.
• Zone‑based athletes: Those who train primarily by heart rate or power and want optical confirmation of zone compliance rather than numerics.

Users who should evaluate carefully

• Apple Watch‑centric athletes: The engo3 page implies Apple Watch compatibility, but structured workout parity and features like Strava Live Segments are not confirmed. Verify support for specific Apple Watch features before upgrading.
• Budget‑conscious purchasers: The price increase is material. Calculate whether the colour HUD and structured mode provide enough value to justify the extra £40–£60 over the prior generation.
• Multi‑sport athletes who require full waterproofing: Engo 3 is rain‑ready but not swim‑proof. Triathletes must plan for transitions and decide whether a wrist device remains preferred for in‑water metrics.

Migration checklist for engo2 owners

• Confirm feature parity for Apple Watch features you rely on—especially if you used Strava Live Segments on engo2.
• Test Garmin structured session sync if you regularly use that workflow; compatibility is broad but not universal.
• Consider whether the incremental weight matters for your racing setup. For most, the extra grams will be negligible.

Practical setup and in‑use tips

Getting the most out of Engo 3 requires a few setup steps and on‑trail habits. These practical tips reduce friction and enhance reliability.

Pairing and initial configuration

• Update firmware: Ensure both the glasses and connected devices run the latest firmware. Updates can fix pairing quirks and improve stability.
• Calibrate zones and data fields: Preload the zones on your Garmin device and confirm the watch sends those zone definitions to the glasses. Choose the six most useful data fields per screen. Keep screens simple for quick glances.
• Practice controls: Spend a low‑risk session getting used to the double‑tap control. The tactile action should be easy to perform with gloves or during rain. Familiarity prevents fumbling mid‑interval.

Display settings and brightness

• Adjust brightness for conditions: High brightness drains battery faster. Use the lowest readable setting for daylight and increase for low light. Photochromic lenses help manage variations but do not replace brightness adjustments.
• Limitive update frequency where possible: If the app or device allows, reduce refresh rates for non‑critical metrics to conserve battery on long sessions.

Mounting and helmet interaction

• Helmet fit and eyewear stability are critical. Ensure the temple arms sit securely under the helmet without pinching. A secure fit prevents the HUD from shifting during sprints or rough singletrack.
• Use nose pads or adjust temple length if slippage occurs. Small adjustments have oversized impact on stability.

Troubleshooting common issues

• Bluetooth dropout: Reboot both devices, clear stale pairings and re‑pair. Bluetooth 5.4 is resilient but not immune to interference.
• Misaligned zones: If the colour feedback feels incorrect, check zone definitions on the source device (watch) rather than the glasses. Zones configured on Garmin Connect should propagate to the watch and then to the HUD.
• Fog and condensation: Photochromic lenses help in light changes; anti‑fog treatments or adequate ventilation during high‑effort sessions prevent internal condensation.

Training use cases and scenarios

Here are concrete scenarios where Engo 3 affects training quality and outcomes.

Interval sessions on the road or track A runner tackling 12 x 400m with 60s recoveries needs rapid confirmation during each repeat. Engo 3’s structured mode shows the interval countdown and a colour gauge for pace. The runner spends less cognitive energy checking splits and more on maintaining form. The result is better interval consistency and more reliable workouts.

Tempo rides and threshold holds Cyclists performing 3 x 20‑minute threshold rides can watch the colour shift to maintain target power. During a group ride, the HUD allows them to remain a safe hand distance from bars while still checking whether the effort is correct. This improves group dynamics and reduces the need to shout numbers to teammates.

Long endurance events During multi‑hour efforts, pacing strategy often involves broad strokes—run by feel, then check numbers at aid‑stations. An ultra runner with Engo 3 can use colour confirmation to ensure they remain within the planned aerobic zone during night hours when reading small text is harder. This lowers the risk of peaking early or falling into a walk.

Races with frequent transitions In events requiring transitions and rapid intensity shifts, such as criteriums or technical road races, glanceable feedback lets athletes confirm readiness without taking hands off bars. The HUD provides a situational advantage when split‑second pacing decisions matter.

Coached athletes and remote guidance Coaches who assign workouts via Garmin Connect expect compliance and data quality. Engo 3 helps athletes stick closer to prescribed values, improving training efficacy and making post‑session analysis more meaningful. For athletes training remotely, the device acts as an on‑device coach that translates plans into execution.

Limitations and unanswered questions

No product is perfect. Understanding the limitations clarifies realistic expectations.

Feature parity across platforms Engo 3 clearly supports Garmin structured sessions. The product page indicates Apple Watch and Suunto compatibility for metrics, but it does not explicitly confirm structured workout features or legacy Apple Watch features like Strava Live Segments that were present on engo2. Buyers who depend on platform‑specific functionality must verify before purchase.

Battery performance under heavy use The 20‑hour claim is attractive, but real battery life depends on user behavior. Athletes planning continuous high‑brightness display use or repeated structured sessions should anticipate shorter runtimes.

Visibility and ambient light HUDs are always a compromise between being bright enough to be readable and dim enough to not wash out vision. Very bright sun angles, reflective pavement or complex lighting conditions can affect perceived contrast. Photochromic lenses and adjustable brightness reduce this, but perfect visibility under every condition is unlikely.

Legal and safety considerations Using any head‑mounted display while operating a vehicle or in traffic may be subject to local laws and regulations. Athletes must apply common sense and obey local rules. The HUD should not replace situational awareness—colour cues simplify information intake, but they do not replace visual scanning for hazards.

Longevity and service ecosystem Long‑term reliability, firmware support cadence and the company’s responsiveness to bugs will determine the glasses’ real‑world durability. Prospective buyers should check warranty terms and the company’s track record for firmware updates and customer service.

Price and market competition At £299.95–£349.95, Engo 3 sits in a mid‑premium bracket for sport electronics. Buyers comparing HUDs or alternative feedback methods (handlebar mounts, auditory coaching, bike computers) will weigh the hands‑free benefits against the price and decide based on training style and priorities.

Price, availability and buying advice

Engo 3 launches at £299.95 for the standard tinted lens and £349.95 for the photochromic variant. Shipping begins 31 March. The company’s site lists compatibility and product details; buyers should confirm specific watch and app combinations before ordering.

How to evaluate value

• If structured Garmin workouts and long battery life are core to your training, the upgrade is straightforwardly valuable.
• If you’re an Apple Watch first user who relies on Strava Live Segments or unique Apple Watch integrations, verify those features exist for engo3. Absence of explicit mention suggests differences from engo2.
• Try before you buy if possible. Comfort, display readability, and control ergonomics are personal. Retail demo units or return policies reduce purchase risk.

Where to buy Engo EyeWear’s direct store will be the primary channel at launch. Authorized retailers may follow. Check for promotions or bundle offers (frames + lenses) that can change the effective price.

How Engo 3 fits into a broader training tech stack

HUD eyewear does not replace data ecosystems; it integrates into them. Engo 3 complements watches, bike computers and apps by offering on‑the‑move, glanceable confirmation of targets.

Role in the tech stack

• Execution layer: Engo 3 focuses on immediate execution—guiding athletes during a session. Post‑session analysis still happens on watches, bike computers and platforms like Strava or TrainingPeaks.
• Redundancy and cross‑checks: For athletes who favor data redundancy, HUDs provide an independent feedback channel. If a watch face is obstructed or a handlebar mount fails, the glasses remain active.
• Integration points: The glasses benefit most when the user’s watch or head unit is the single source of truth for zones and workout instructions. Keeping a reliable central device avoids fragmentation.

Complementary devices and workflows

• Power meters and heart rate monitors continue to supply the primary metrics. The HUD displays these derived values.
• Coaches and training platforms that export structured workouts to Garmin make the most of Engo 3’s structured mode. TrainingPeaks workflows that sync to Garmin can indirectly enable HUD guidance.
• For navigation, the HUD can display simple cues, but complex turn‑by‑turn maps remain better on dedicated bike computers unless integration improves.

The competition landscape and alternatives

Heads‑up displays remain a niche but growing category. Buyers should compare the Engo 3 against alternatives depending on priorities.

Alternative approaches to hands‑free feedback

• Bone‑conduction audio and earbuds: Audio cues provide hands‑free feedback without an on‑eye device. They work well for pace cues and interval alerts but can be overwhelmed by environmental noise.
• Handlebar‑mounted devices: Bike computers display rich data and maps but require taking a hand off the bars to read closely and can interrupt aerodynamics.
• Wrist wearables: Watches are versatile but demand head drops or wrist raises to read values, which is suboptimal in traffic or technical sections.

Where Engo holds advantage

• Glanceability with preserved peripheral vision: The HUD keeps eyes forward while delivering data.
• Reduced need for hand interactions during activity.
• Structured workout visualization at eye level for Garmin users.

Where traditional devices still win

• Rich navigation and map detail.
• Post‑session data capture and analysis depth.
• Lower price points for basic data display.

Final evaluation: who benefits and why now

Engo 3 represents a meaningful step in practical HUD design rather than a minor refresh. Colour coding turns data into instant decisions; Garmin structured workout sync moves the display from passive to directive; and extended battery life expands scenarios where the device is reliably usable.

Buyers who train with precision, depend on structured plans and value uninterrupted, glanceable feedback should consider Engo 3 a strong option. Those whose training revolves around Apple Watch structured features, who prioritize full waterproofing, or who place strict limits on equipment spend may need to verify compatibility and weigh alternatives.

The product’s marginal weight increase and price bump are reasonable trade‑offs for the new capabilities. The decision hinges on how much utility an athlete extracts from on‑the‑move, colour‑coded coaching. For many, the Engo 3 converts a training aid into a pragmatic coaching tool that improves session execution and safety.

FAQ

Q: What are the headline improvements of Engo 3 over engo2?
A: Engo 3 introduces a multi‑colour HUD that uses red‑to‑green zone mapping, adds a structured workout mode that syncs with Garmin sessions to display live gauges and interval countdowns, and extends battery life from 12 to 20 hours. It also changes controls to a double‑tap temple input and increases weight slightly from 36g to 38.5g.

Q: Which devices are compatible with Engo 3?
A: Engo lists compatibility with 81+ Garmin devices, Apple Watch and Suunto. Garmin structured workout support is explicitly confirmed. Apple Watch and Suunto compatibility for live metrics is supported, but structured workout parity and some legacy Apple Watch features (for example, Strava Live Segments on engo2) are not explicitly referenced—verify specific features before purchase.

Q: How does the new colour HUD improve training?
A: Colour coding converts numerical data into an immediate, instinctive signal. Green confirms being on target, red signals being above the zone and amber indicates drifting off. That rapid visual feedback reduces cognitive load, shortens the time between data and correction, and keeps attention forward, which improves safety and consistency.

Q: Is the battery claim of 20 hours realistic?
A: The 20‑hour figure applies to continuous use under unspecified conditions. Real battery life depends on brightness, frequency of display updates, structured workout usage and ambient temperature. Expect high‑brightness or heavy structured session use to reduce total runtime; the 20‑hour rating represents a significant improvement over the prior 12‑hour figure.

Q: Is Engo 3 waterproof? Can I use it in all weather?
A: Engo 3 is rated IP55, which protects against dust ingress and water jets. It is suitable for sweat and rain but not for submersion. Do not use the glasses for swimming.

Q: What control methods does Engo 3 use?
A: The glasses use a double‑tap on the temple to control the screen and navigate data screens. This replaces the gesture sensor used on the engo2.

Q: Can Engo 3 display navigation directions or maps?
A: Engo 3 supports display of basic navigation cues and a broad set of data fields (40+ metrics, up to 6 per screen). Complex maps and detailed route visualizations remain better suited to dedicated bike computers and smartphone mapping apps.

Q: Who will see the biggest benefit from upgrading?
A: Athletes who use Garmin structured workouts, train regularly by zones (heart rate or power), and do long sessions where battery life matters will gain the most. Those reliant on Apple Watch‑specific features or on a limited budget should verify feature support before upgrading.

Q: What should I check before buying Engo 3?
A: Confirm that your primary training device (watch or bike computer) is listed as compatible, check whether the structured workout features you rely on are supported (especially if you use Apple Watch or Strava Live Segments), test fit and lens options if possible, and assess whether the price increase aligns with the value you expect from colour HUD and longer battery life.

Q: Where and when will Engo 3 be available?
A: Engo 3 is priced at £299.95 (standard tinted lens) and £349.95 (photochromic) with shipping beginning on 31 March. The product is available through Engo EyeWear’s online store and, potentially, through authorized retailers.

Q: How should I configure Engo 3 for the best experience?
A: Update firmware on both the glasses and your watch, set your target zones on the source device (e.g., Garmin) so they propagate to the glasses, choose a small number of high‑priority fields for glanceability, practice the double‑tap control in a low‑risk environment, and adjust brightness for current light conditions to balance readability and battery life.

Q: What are common troubleshooting steps for pairing or display issues?
A: Reboot both devices and clear old pairings, ensure firmware is up to date, re‑pair the devices if connection drops occur, check zone definitions on the source device if colour feedback seems off, and adjust brightness or screen update settings if display behavior seems inconsistent.

Q: Is Engo 3 worth the price premium compared to engo2?
A: That depends on your priorities. If colour HUD, Garmin structured workout integration and extended battery enable materially better training for you, the price increase is justified. If your usage was satisfied by monochrome display and shorter battery life, the older model might remain adequate if available.

Q: How durable are the lenses and frames?
A: Engo 3 uses sport‑grade frames and offers tinted and photochromic lens options suited to outdoor use. The IP55 rating supports typical outdoor conditions. For specifics about scratch resistance, replacements and warranty, consult Engo’s support documentation and warranty policy.

Q: Can I use Engo 3 with third‑party apps that export workouts to Garmin?
A: Yes, workouts exported to Garmin Connect and then synced to a compatible Garmin device should translate to the watch and therefore to Engo 3’s structured mode, provided your Garmin device is within the compatible list and the export maintains structured workout metadata.

Q: How will the colour HUD perform at night?
A: Colour visibility at night depends on brightness settings and lens choice. Photochromic lenses transition for varying light but are less relevant at night. Adjust brightness to the lowest readable level to avoid glare and conserve battery.

If you have a specific device model or training workflow, provide the watch and app details and this guide will help determine whether Engo 3 covers your needs.